Bobbin guide



Oct. 22, 1940. w THATCHER 2,219,038

BOBBIN GUIDE Filed May 13, 1940 VENTOR. HAEEY.M771AT 5e.

ATTORNEY,

Patented Oct. 22, 1940 t BOBBIN GUIDE Harry W. Thatchcn Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass., a corporation' of Maine.

Application May 13, 1940, Serial No.-334,7,75

* Claims. (01. 139-251 The present invention pertains .to bobbin changing looms and pertains more particularly to the bobbin guide for the bobbin carrier or hopper of such looms.

5 The principal object of my invention is to provide a bobbin guide which has a novel and improvide means for engaging the bobbin next to be transferred and holding the same from turning on its own axis. b

The preferred embodiment of my invention is illustrated on the accompanying drawing, of which:

Fig. 1 is a transverse sectional View of the rotary hopper to which my invention has been applied;

Fig. 2 is an enlarged side elevation of the bobbin guide and a bobbin, and

Fig. 3 is a view in perspective of the rear face of the bobbin guide.

The loom to which my invention has been applied includes a lay I which reciprocates forwardly and rearwardly (the front of the loom is at the left of Fig. 1) and which carries a shuttle box 2 for receiving a shuttle 3. The shuttle box 2 is so positioned that when the lay is at front center the shuttle will be directly beneath the transferring mechanism of the hopper.

The hopper shown consists of a hopper stand 4 carrying discs, such as 5, which are rotated step by step by means of a feed pawl 6 and ratchet 1. Rotation of the discs serves to successively present the bobbins 8 in position to be transferred to the shuttle, the actual transfer being accomplished by means of a transfer hammer 9 actuated when dog H! is positioned to be engaged by lay bunter ll. As the bobbins approach transfer position they are held in the hopper by a bobbin support l2.

The parts as thus far described are old and 40 well known in the art and form no part of the present invention except as theyare necessary elements of a complete combination.

The bobbin guide which is of my invention, includes a substantially horizontal attaching por- 45 tion l3 and an upwardly extending portion M. The guide is secured to the hopper stand by screws (not shown) which pass through holes I5 in the horizontal attaching portion l3. The rear 50 face of the portion 14 serves to position and guide the butt of the bobbin during transfer. This face may be grooved, as at Hi to accommodate the rings I! usually provided on the bobbin butts.

The lower portion l8 of the rear face of portion I4 is inclined upwardly and rearwardly, and the upper portion 19 of the rear face of portion l4 isinclined upwardly and forwardly.

A projection 20 of rubber or other resilient friction material is secured to the portion It adjacent the upper end thereof and extendsrearwardly. The projection 20 may be secured to the portion M in any desiredmanner. As shown, the portion 14 has a hole 2| therein in which projection 20 is secured by meansofan enlargement on the forward end of the projection.

The operation of the device is as follows? The bobbin next to be transferred is positioned upon the rotation of the hopper, with its .butt resting against the lower portion of the upwardly and forwardly inclined portion 19. 'In this position, due to the inclination of portion IS, the point or line of contact A between the bobbin butt and portion 19 will be below the longitudinal center line B of the bobbin as clearly shown on Fig. 2. With the bobbin in this position the projection 20 will contact the bobbinbutt, the point or line of contact C between projection 20 and the bobbin butt being above the longitudinal center line B of the bobbin as clearly shown on Fig. 2. Thus the bobbin butt will be held by the hopper against the two vertically spaced contact points with a wedging action thereby preventing axial rotation of the bobbin. Further due to the projection 20 contacting the bobbin butt at a point above the longitudinal center line thereof, there will be no wearing action of the bobbin butt against projection 20 during the downward ment of the bobbin on transfer. I

Havingfully disclosed the preferred embodiment of my invention, I claim:

1. In combination with the hopper stand and hopper of a bobbin changingloom, a bobbin guide secured to said stand for positioning and guiding the butt of the bobbin during transfer, said guide including a forwardly and upwardly inclined surface providing adjacent its lower end tangential movecontact with the butt of said bobbin, the line of contact being located below the longitudinal center line of said bobbin, and resilient friction means located adjacent the upper end of said inclined surface and projecting rearwardly there from to contact the upper portion of said butt,

the point of contact of said resilient means with. said butt being located above the longitudinal center line of said bobbin, whereby said bobbin is held with a wedge-like action against axial rotation.

2. In a bobbin changing loom, the combination of a hopper for holding a plurality of reserve bobbins, a stand for supporting said hopper, means for moving said hopper to present each of said reserve bobbins successively in position for transfer, a bobbin guide secured to said stand, said bobbin guide having a rear face for holding and guiding the butt of the bobbin next to be transferred, the upper portion of said rear face being forwardly inclined upwardly, the lower portion of said inclined portion providing a contact surface for the butt of the bobbin next to be transferred, and a projection of resilient frictionmaterial located adjacent the upper end of said inclined 'portion and extending rearwardly to provide a contact surface with said butt, whereby said bob.- bin butt is held with a wedge-like actionagainst axial rotation.

3. In a bobbin changing loom, the combination of a hopper for holding a plurality of reserve bob- I bins, a stand for supporting said hopper, means for moving said hopper to present each of said reserve bobbins successively in position for transfer; a bobbin guide secured tolsaidlstand, said guide comprising anattaching" portion, a bobbin engaging portion extending upwardly from said attaching portion, the lower part of said engaging portion being rearwardly inclined upwardly, the

upper part of said engaging portion being forwardly inclined upwardly, the lower part of said forwardly inclined portion providing a contact surface for the butt of the bobbin next .to be transferred, said surface contacting said bobbin butt below the longitudinal center line of said bobbin, a projection secured to said forwardly inclined portion adjacent its upper end and extendtion, said second named portion having two vertically spaced surfaces for contacting a bobbin butt, the lower ofsaid surfaces being located below the horizontal center line of a bobbin butt when in transfer position and the upper of said surfaces being above the horizontal center line of the bobbin butt when in transfer position, whereby axial rotation of the bobbin is prevented,

said, upper :surface comprising resilient friction material. i o :7

5. A bobbin guide comprising an attaching portion and a bobbin guiding portion extending upwardly from said attaching portion, the lower part of said guiding portion being rearwardly inclined upwardly and the upper part of said guiding portion being forwardly inclined upwardly and a projection secured to said forwardly inclined portion adjacent its upper end and extending rearwardly therefrom, said projection being composed of resilient friction material.

'- HARRY W. THLATCHER. 

